Slide-up turnover door.



F. WJBOUGH'TON.

ASLIDE-UP TURNVER DOOR. v APPLICATxoN man FEB. 5. 1,915..

'111,21 6.,@- d y Patented Feb. 13,1917.

3 SHEETS-SHEET 2.

F. W. BOUGHTON.. SLIDE-UP TURNOVER DOOR. APPL|cA T1oN man FEB. s. 1915'.

Patented Feb. 13, 1917.

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l n sacarte naar @uur FRED W. BOUGHTON', OF BOSTON, MASSACHUSETTS.

SlLIDlE-l'? TUE/HOVER DOUE.

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Specification of -Letters Patent Patented Feb. 13,

lApplication filed. February 5, 1915. Serial Ne. 6,341.

To all whom it. may concern:

Be it kno-wn that l, FRED tlf. Boneirron, a citizen of the UnitedStates, and a resident of Boston, in the county of Suffolk and State ofMassachusetts, have invented certain new and useful mprovements in SlideUp rlurnover Doors, of which the following is a specification. v

This invention relates to that class of doors, known as'slideeup andturn-over doors, which are opened by raising and closed by lowering,vand to the means employed in their operation; and its. object is toprovide a self-counterbalancing door that is of simple construction ,offew L) small space; close fitting;

a door that can operated without the use of overhead links, or otherrigid supports, other than the door frame; a door that in its closedposition is out of the way and the least exposed to injury a doorfurnished with simple` self-closing means and self locking means; adoorthat can be easily operated either from the front, or from the rear;and a door that can be equipped with raising means normally inoperative,but. rendered operative by engagement with a' cam carj ried` by anelevator, or' by other desired means. j

rlhe invention isillustrated by the accom* j panying drawings, in whichthe door in its raised position;

Figure 1 is afront elevation of the door;

Fig. 2 is a section-.on line 2 2 Fig. 1; Fig. 3 is a section on line 3-3Fig. 1; Fig, 4 isa. section on line 4w4 Fig. 1; Fig. 5 isa section online 5-5Fig- 1; Fig. 6 is a view similar to Fig. 3 showing Fig. 7 is asection on line 7 7 Fig. 1; Fig. 8 is a section on line 8 8 Fig. 7 Fig.9 is a view similar to Fig. `7 showing one phase of the invention in itssimplest form.

rlhe door 1, adapted to fit into the v frame 2, is furnished at itslower corners with forwardly projected lugs 3, wherein are journaledlaterally projected wheels 4 adapted to travel up and ldown tracks 5,provided by the frame, and to be guided and confined in their lowermostlugs 6.

rlhe door is raised and lowered by means of two oppositely disposedcables 7, one end of which is attached to forwardly projected lugs 8 onthe ipper corners of the door and the other end of which is attached toforpositionby the vertical floor wardly and laterally projected lugs 9near parts; disposable in.

vis also furnished above laterally projected hooks 37, adapted tov Thesecables 7, intermewind, each upon itself, grooved spools 10, 10fL fixedlymounted` on shaft 11 journaled in brackets 12, 12a projected from` thewall 13 and ceiling 14; said shaft 11 being furnished with gear 15adapted to engage pinion 1G carried by sprocket wheel 17 lixedly mountedon shaft 18 slidingly journaled in-bracket 12 and adapted to be engagedand driven by (but normally out of engagement with) the endless chain 19running over idlers 20, disposed above and below the door; said chain 19being adapted to be engaged rearwardly by and travel over idlers 21journaled on the upper and lower sides of the plunger 22, which extendsrearwardly' through the wall 13 and has its forwardend slotted toslidingly engage shafts 11 and 18 and vertically forked to straddle thesprocket wheel 17 its lower corners. diate their ends, around the doublewhereby, by the forward movement of said and upon which it winds uponitself, saidv spool being fiXedly mounted on shaft 11.

rlhe pinion 16 is held in engagement with gear'l by yoke 30centrally'and oscillatingly mounted onl shaft 11 and straddling saidpinion `16 and spool 10 and having its arms forwardly slotted at 3,1 toengage the sliding shaft 18and draw it with pinion 16 rearwardlybringing the latter into engagement with gear land to maintain suchengagement; the rearward end of said yoke 30 beinofconnected by wire32'with weight 33, whic -is held suspended by a. second wire 34connected with and adapted to be parted by the fusible link 35. Y

rlhe door -1 is centrally and forwardly furnished with the manuallyoperated double throw gravity latch 36, whereby it is automaticallylocked inclosing. The door engage the cables 7, asthe door is apeproaching its .closed position, and keep them behind the latch, as shownin Fig. 3. rll`he diameters of the cables and widths of the grooves ofthe spools are so proportioned asto permit the cables to readily windthe `latch with,

SSD 1,216,902

upon themselves in the grooves and to read ily unwind. The cables 7 are,each, preferably of one piece extending, when the door is in its loweredposition, as shown in Figs. l and 3, from the bottom of the door to therear of'hook 37, thence to the bottom of the non-slidable; chain 19engaging sprocket wheel 17.

. rllie operation 1s as follows: The door be ing closed and locked, asshown 1n Fig. l,

vthe operator. unlatches it and pulls its upper part forward; he thenpulls upon the endless chain 19 and, assisted by the counterweight Q6,raises the door to its overhead position, in lwhich position the lowerend of the door engages the top of the frame 2,

while the door in being raised continually extends forwardly andupwardly being held in this position by the cables as they wind upon theouter grooves'and unwind from the inner grooves of the spools 10, 10a.rlhe `door is lowered by simply reversing the pull upon the chain;thedoor automatically closing and being automatically locked by latch 36.

rlhe plunger attachment, adapted to control the engagement of chain 19and sprocket wheel 17 as described, is designed particularly for usewith doors leading into elevator wells; the plunger serving, whenactuated by cam Q-'l carried by car 25, to

'bring the sprocket chain into engagement with the sprocket wheel.

A seriesY of doors leading into an elevator well from different floorscould thus be successively controlled by a car, as it traveled up anddown, and one endless chain could be employed in connection therewith.

The fusible link attachment is designed to automatically disengage gears15 and 16 and the sprocket vwheel and chain, as described, in case offire; the weight 33, upon being released by the fusible link 85,depressing the rearward en d of yoke 30 and raising its forward end,thereby disengaging said gears and permitting the vdoor to automaticallyclose.y

The grooved spools 10, 10", with the cables wound thereon, each cableupon itself as described, afford means for automatically and inverselyvarying the leverage applied at the bottom of the door and that appliedat the top of the door, as the door i's raised and lowered; thusproviding for variously counterbalancing the doorr most advantageouslyinits various positions and there y causing its effective weight to remainpractically constant and the counterweight 26,

supported by `cable 27, winding upon itself on grooved spool 29, acts,similarly as an automatically varying weight according to the differentpositions of the door.

The door above described, when used in its simplest form, as shown inFig. 9, without the-fusible link attachment, needs no counterweighting,being'easily raised and low ered by a pull upon the chain and adapted,

through theaction of the grooved spools, .to remain in any position itmay assume; thus having a marked advantage overall other doors o f asimilar.character, in all of .which it is necessary to employ acounterbalance equal in weight to that of the door, thus doubling theweight to be supported and operated and thereby increasing the fric- Ation to be overcome and the consequent strain upon the parts.

The cables 7, arranged as described, cause the upper`end of the 'door totravel in a substantially horizontal plane, traveling for wardly at aconstantly decreasing and rearwardly-,at a constantly rincieasing speed,thereby insuring its closing; the s'peed of the bottom of the door beingjust the re` verse, gradually increasing as the door is raised andgradually decreasing as the door closes.

ln combination, `a slide-up turn-over door; a frame therefor; a rotaryshaft horizontally disposed above and forwardly of the frame; one ormore double grooved spools iixedly mounted on said rotary shaft; a cable'of approximately the width of the grooves attached to each spool and'tothe door at or near the to-p thereof and wound upon itself in one ofsaid grooves in one direction, when the door is closed or lowered;another cable attached to each spool and to said door at or near thebottom thereof and wound upon itself in the other of said grooves in theopposite direction, when the door is opened or raised; and means forrotatably reciprocating the shaft, thereb raising and lowering the door.

lln testimony whereof I have aiiixed my signature, in presence of twowitnesses.

FRED lrV. BOUGHTN.

l/Vitnesses CLARENCE L. NEWTON, RALPH W. FOSTER.

